Theres a nice oil radiator made by Kenwood at gome depot thats 79$. its digital and has a low med high. This is what i use in snake room and its built in thermostat never failed me yet.

With it on low to med youll never consume more thatn 750 and it stays where you set it along with timers of when to kick on and off. With that hooked to a johnson should be all set.

http://www.homedepot.com/h_d1/N-5yc1...1&ddkey=Search